Datasheet LTC2345-18 (Analog Devices) - 9
| Manufacturer | Analog Devices |
| Description | Octal, 18-Bit, 200ksps Differential SoftSpan ADC with Wide Input Common Mode Range |
| Pages / Page | 40 / 9 — Typical perForMance characTerisTics. TA = 25°C, VDD = 5V, OVDD = 2.5V, … |
| File Format / Size | PDF / 1.9 Mb |
| Document Language | English |
Typical perForMance characTerisTics. TA = 25°C, VDD = 5V, OVDD = 2.5V, Internal
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LTC2345-18
Typical perForMance characTerisTics TA = 25°C, VDD = 5V, OVDD = 2.5V, Internal Reference and Buffer (VREFBUF = 4.096V), fSMPL = 200ksps, unless otherwise noted. Integral Nonlinearity Differential Nonlinearity Integral Nonlinearity vs Output Code and Channel vs Output Code and Channel vs Output Code and Range
2.0 2.0 2.0 ±4.096V RANGE ALL RANGES BIPOLAR DRIVE (IN– = 2.5V) FULLY DIFFERENTIAL DRIVE (IN– = –IN+) ALL CHANNELS 1.5 1.5 1.5 ONE CHANNEL ALL CHANNELS 1.0 1.0 1.0 ±2.048V AND ±2V RANGES 0.5 0.5 0.5 0 0 0 –0.5 –0.5 –0.5 INL ERROR (LSB) DNL ERROR (LSB) INL ERROR (LSB) –1.0 –1.0 –1.0 –1.5 –1.5 –1.5 –2.0 –2.0 –2.0 –131072 –65536 0 65536 131072 0 65536 131072 196608 262144 –131072 –65536 0 65536 131072 OUTPUT CODE OUTPUT CODE OUTPUT CODE 234518 G01 234518 G02 234518 G03
Integral Nonlinearity Integral Nonlinearity Integral Nonlinearity vs Output Code and Range vs Output Code and Range vs Output Code
4 4 2.0 UNIPOLAR DRIVE (IN– = 0V) ±4.096V RANGE FULLY DIFFERENTIAL DRIVE (IN– = –IN+) ONE CHANNEL ONE CHANNEL 3 3 1.5 ARBITRARY DRIVE 0V TO 2.048V RANGE 2 2 1.0 IN+/IN– COMMON MODE ±2.048V AND ±2V SWEPT 0V to 5V RANGES 1 1 0.5 0 0 0 0V TO 4.096V, AND 0V TO 4V RANGES –1 –1 –0.5 INL ERROR (LSB) INL ERROR (LSB) INL ERROR (LSB) ±4.096V AND ±4V –2 –2 –1.0 RANGES –3 –3 –1.5 FULLY DIFFERENTIAL DRIVE (IN– = –IN+) –4 –4 –2.0 –131072 –65536 0 65536 131072 0 65536 131072 196608 262144 –131072 –65536 0 65536 131072 OUTPUT CODE OUTPUT CODE OUTPUT CODE 234518 G05 234518 G06 234518 G04
32k Point FFT fSMPL = 200kHz, DC Histogram (Zero-Scale) DC Histogram (Near Full-Scale) fIN = 2kHz
60000 60000 0 ±4.096V RANGE ±4.096V RANGE ±4.096V RANGE σ = 2.1 σ = 2.2 –20 FULLY DIFFERENTIAL DRIVE (IN– = –IN+) 50000 50000 –40 SNR = 92.1dB THD = –111dB 40000 40000 –60 SINAD = 92.0dB SFDR = 113dB –80 30000 30000 COUNTS COUNTS –100 20000 20000 –120 AMPLITUDE (dBFS) –140 10000 10000 –160 0 0 –180 –10 –8 –6 –4 –2 0 2 4 6 8 10 131052 131056 131060 131064 131068 131072 0 20 40 60 80 100 CODE CODE FREQUENCY (kHz) 234518 G07 234518 G08 234518 G09 234518f For more information www.linear.com/LTC2345-18 9 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Converter Characteristics Dynamic Accuracy Internal Reference Characteristics Reference Buffer Characteristics Digital Inputs and Digital Outputs Power Requirements ADC Timing Characteristics Typical Performance Characteristics Pin Functions Configuration Tables Functional Block Diagram Timing Diagram Applications Information Board Layout Package Description Typical Application Related Parts
Typical perForMance characTerisTics TA = 25°C, VDD = 5V, OVDD = 2.5V, Internal Reference and Buffer (VREFBUF = 4.096V), fSMPL = 200ksps, unless otherwise noted. Integral Nonlinearity Differential Nonlinearity Integral Nonlinearity vs Output Code and Channel vs Output Code and Channel vs Output Code and Range
2.0 2.0 2.0 ±4.096V RANGE ALL RANGES BIPOLAR DRIVE (IN– = 2.5V) FULLY DIFFERENTIAL DRIVE (IN– = –IN+) ALL CHANNELS 1.5 1.5 1.5 ONE CHANNEL ALL CHANNELS 1.0 1.0 1.0 ±2.048V AND ±2V RANGES 0.5 0.5 0.5 0 0 0 –0.5 –0.5 –0.5 INL ERROR (LSB) DNL ERROR (LSB) INL ERROR (LSB) –1.0 –1.0 –1.0 –1.5 –1.5 –1.5 –2.0 –2.0 –2.0 –131072 –65536 0 65536 131072 0 65536 131072 196608 262144 –131072 –65536 0 65536 131072 OUTPUT CODE OUTPUT CODE OUTPUT CODE 234518 G01 234518 G02 234518 G03
Integral Nonlinearity Integral Nonlinearity Integral Nonlinearity vs Output Code and Range vs Output Code and Range vs Output Code
4 4 2.0 UNIPOLAR DRIVE (IN– = 0V) ±4.096V RANGE FULLY DIFFERENTIAL DRIVE (IN– = –IN+) ONE CHANNEL ONE CHANNEL 3 3 1.5 ARBITRARY DRIVE 0V TO 2.048V RANGE 2 2 1.0 IN+/IN– COMMON MODE ±2.048V AND ±2V SWEPT 0V to 5V RANGES 1 1 0.5 0 0 0 0V TO 4.096V, AND 0V TO 4V RANGES –1 –1 –0.5 INL ERROR (LSB) INL ERROR (LSB) INL ERROR (LSB) ±4.096V AND ±4V –2 –2 –1.0 RANGES –3 –3 –1.5 FULLY DIFFERENTIAL DRIVE (IN– = –IN+) –4 –4 –2.0 –131072 –65536 0 65536 131072 0 65536 131072 196608 262144 –131072 –65536 0 65536 131072 OUTPUT CODE OUTPUT CODE OUTPUT CODE 234518 G05 234518 G06 234518 G04
32k Point FFT fSMPL = 200kHz, DC Histogram (Zero-Scale) DC Histogram (Near Full-Scale) fIN = 2kHz
60000 60000 0 ±4.096V RANGE ±4.096V RANGE ±4.096V RANGE σ = 2.1 σ = 2.2 –20 FULLY DIFFERENTIAL DRIVE (IN– = –IN+) 50000 50000 –40 SNR = 92.1dB THD = –111dB 40000 40000 –60 SINAD = 92.0dB SFDR = 113dB –80 30000 30000 COUNTS COUNTS –100 20000 20000 –120 AMPLITUDE (dBFS) –140 10000 10000 –160 0 0 –180 –10 –8 –6 –4 –2 0 2 4 6 8 10 131052 131056 131060 131064 131068 131072 0 20 40 60 80 100 CODE CODE FREQUENCY (kHz) 234518 G07 234518 G08 234518 G09 234518f For more information www.linear.com/LTC2345-18 9 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Converter Characteristics Dynamic Accuracy Internal Reference Characteristics Reference Buffer Characteristics Digital Inputs and Digital Outputs Power Requirements ADC Timing Characteristics Typical Performance Characteristics Pin Functions Configuration Tables Functional Block Diagram Timing Diagram Applications Information Board Layout Package Description Typical Application Related Parts
